Preheat oven to 350°. Arrange a strip of mashed potatoes around the edge and through the middle of a buttered individual casserole. In the indentation on either side of middle potato strip, place in sequence the following: taco sauce, dried onions, Jack cheese and one egg. Season tops with salt, pepper, and paprika; drizzle with melted butter. Bake 15 to 20 minutes to desired doneness. Garnish with parsley.